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Pure Sand which is without any impurities and its light weight material (Mineral)
This pure sand is used in Mega Constructions, Roads, Bridges & Infrastructure projects for supporting the giant horizontal and vertically inclined structures (Like wise Angle of Repose)
Moreover, also used as ground bedding for Portable pipelines and non portable pipelines, storm water line and Sewerage Trunk line. Roads reinstatement works, back filling, Soil settlement and etc...
Sometimes impure sand can be used depend upon the project criteria with necessary approval.
More details on sands, its classification and its engineering characteristic refer Soil Mechanics.
Embankments are of Dam or Highway,
Use of sand varies with the type of sand, as being Geotechnical Engineer with geology background that I know the following types of sands with their different varying behaviors,
Coral Sand
Volcanic ash
Glass sand
Immature sand
Gypsum sand
Ooid sand
Silica sand
Black sand
Green sand
Desert sand
Lithic, mixed, Biogenic, Continental, Quartz, etc Sands.
It depends on project area, requirement of the project, available sand & lot of things.
Normally sand is a kind of filter in Embankment, that can be used with the requirement of the project design.
